daniel



0. WARNER Bit for Boring.

Patented Aug. 13; 1867.

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IMPROVEMENT IN DB-ILLS.

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TO ALL WHOM IT MAY CONCERN;

Be it known that I, DANIELWARNER, of PortC lintou, in the eounty'of Ottawa, and in the State of Ohio, have invented certain new and useful Improvements in Drillsf and do hereby declare thatthe following is a. full, cleitr, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification.

This drill is made of the usual material, havingthe ordinary stem for connecting it to the drilling machine. It is formed with two grooved sides, B, with the two cutting sides or edges, 0', longer than the guide sides v, and its end, with projecting points, 2:, being a lit'tlclonger than the back points s. It will be seen the-t the drill is formed by bevelling' each side a a just opposite to each other, and after forming the cutting point :0 it is also bevelled on each side in a. transverse manner. A drill thus formed is stronger then those now used,aud is self-cleaning. V

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent,

The red A, with its grooved sides 13} cutting edges 0, guides c, bevelled points 4 and z z, for forminge, drill in the manner and for the purposes set forth. t

In testimony that I claim the foregoing I have hereunto set my hand this 30th day of March, 1867.

DANIEL WARNER.

Witnesses:

O. E. NYE, A.-F. LEPPER. 

